package cn.recyclerview;

import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity implements IOnChangeListener {
    private RecyclerView rlvStu;
    private ArrayList<Student> studentArrayList = new ArrayList<>();
    private ArrayList<Student> searchResultList = new ArrayList<>();
    private StuAdpater adapter;
    private Button btnAddStu;
    private Button btnSearch;
    private EditText editKeyword;
    private boolean isResultList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initStudentArrayList();

        initBtnAddStu();

        initAdpater();

        initLayout();
        initSearchView();
    }

    /*初始化搜索模块*/
    private void initSearchView() {
        editKeyword = findViewById(R.id.edit_keyword);
        btnSearch = findViewById(R.id.btn_search);

        btnSearch.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String keyword = editKeyword.getText().toString().trim();
                //使用学生列表和关键字，取得结果
                search(studentArrayList, keyword);
                adapter.changeData(searchResultList);
                isResultList = true;
            }
        });

        editKeyword.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                String keyword = editKeyword.getText().toString().trim();
                search(studentArrayList, keyword);
                adapter.changeData(searchResultList);
                isResultList = true;
            }
        });
    }

    /*使用学生列表和关键字，取得搜索结果*/
    private void search(ArrayList<Student> studentArrayList, String keyword) {
        searchResultList.clear();
        for (int i = 0; i < studentArrayList.size(); i++) {
            Student s = studentArrayList.get(i);
            if (s.getName().contains(keyword)) {
                searchResultList.add(s);
            }
            //年龄搜索
            else if (String.valueOf(s.getAge()).equals(keyword)) {
                searchResultList.add(s);
            }
        }
    }


    /*初始化布局*/
    private void initLayout() {
        rlvStu = findViewById(R.id.rlv_stu);
        rlvStu.setAdapter(adapter);

        LinearLayoutManager manager = new LinearLayoutManager(MainActivity.this);
        rlvStu.setLayoutManager(manager);
    }

    /*初始化适配器*/
    private void initAdpater() {
        adapter = new StuAdpater(MainActivity.this, studentArrayList, MainActivity.this);
    }

    /*设置添加学生按钮*/
    private void initBtnAddStu() {
        btnAddStu = findViewById(R.id.btn_addStu);

        btnAddStu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setClass(MainActivity.this, AddStuActivity.class);
                startActivityForResult(intent, 1001);
            }
        });
    }

    /*返回修改的数据结果*/
    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        if (data == null) {
            return;
        }
        if (resultCode == 2001) {
            String no = "1800" + String.valueOf(studentArrayList.size() + 1);
            String name = data.getStringExtra("NAME");
            int age = data.getIntExtra("AGE", 0);
            int imgId = data.getIntExtra("IMG", R.drawable.dog1);

            Student s = new Student(no, name, age, imgId);
            studentArrayList.add(s);
            adapter.notifyDataSetChanged();
        } else if (resultCode == 3001) {
            String name = data.getStringExtra("NAME");
            int age = data.getIntExtra("AGE", 0);
            int imgId = data.getIntExtra("IMG", R.drawable.dog1);
            String no = data.getStringExtra("NO");

            for (int i = 0; i < studentArrayList.size(); i++) {
                Student s = studentArrayList.get(i);

                if (s.getNo().equals(no)) {
                    s.setName(name);
                    s.setAge(age);
                    s.setImgId(imgId);
                }
            }
            String keyword = editKeyword.getText().toString().trim();
            // 使用学生列表和关键字 得到搜索结果列表
            search(studentArrayList, keyword);
            adapter.changeData(searchResultList);
            isResultList = true;
        }
    }

    /*初始化学生列表*/
    private void initStudentArrayList() {
        Student s1 = new Student("10081", "张一", 19, R.drawable.dog1);
        Student s2 = new Student("10082", "张二", 20, R.drawable.dog2);
        Student s3 = new Student("10083", "张三", 21, R.drawable.dog3);
        Student s4 = new Student("10084", "张四", 22, R.drawable.dog4);
        Student s5 = new Student("10085", "张五", 23, R.drawable.dog5);

        studentArrayList.add(s1);
        studentArrayList.add(s2);
        studentArrayList.add(s3);
        studentArrayList.add(s4);
        studentArrayList.add(s5);

    }

    /*删除学生*/
    @Override
    public void del(final String no) {
        int position = 0;
        for (int i = 0; i < studentArrayList.size(); i++) {
            Student s = studentArrayList.get(i);
            if (s.getNo().equals(no)) {
                position = i;
            }
        }
        studentArrayList.remove(position);
        adapter.notifyDataSetChanged();
    }

    /*编辑学生*/
    @Override
    public void edit(Student s) {
        Intent intent = new Intent();
        intent.setClass(MainActivity.this, EditActivity.class);
        intent.putExtra("NAME", s.getName());
        intent.putExtra("AGE", s.getAge());
        intent.putExtra("IMGID", s.getImgId());
        intent.putExtra("NO", s.getNo());
        startActivityForResult(intent, 1002);
    }


}
